Take it Raw?
Chapter 236
'If I recall correctly, there were seven stages.'
Minor Demon: These were the weakest demons, often useless or naturally occurring in areas with low dark espera. They possess minimal power and are easily dispatched by even partially skilled exorcists.
These were the demons used in the clan's demon hunt event.
Low-Level Demon: Low-level demons are slightly stronger than minor demons and may possess more specialized abilities. They're still considered relatively weak and often serve as foot soldiers for higher-ranking demons.
For reference, the demoness was a low-level demon.
Mid-Level Demon: Mid-level demons are more formidable, possessing greater strength, speed, and intelligence compared to lower-ranked demons. They often have more complex abilities and serve as commanders or enforcers in demon hierarchies.
The city lord was supposedly at this level, while the inquisitors were more or less close.